CN116266779A - Communication method, device and equipment - Google Patents
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- CN116266779A CN116266779A CN202111528326.8A CN202111528326A CN116266779A CN 116266779 A CN116266779 A CN 116266779A CN 202111528326 A CN202111528326 A CN 202111528326A CN 116266779 A CN116266779 A CN 116266779A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
- H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
- H04L1/18—Automatic repetition systems, e.g. Van Duuren systems
- H04L1/1812—Hybrid protocols; Hybrid automatic repeat request [HARQ]
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- H04W76/20—Manipulation of established connections
- H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
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Abstract
The application provides a communication method, a device and equipment, wherein after discarding side uplink communication resources allocated by a network device, terminal equipment sends acknowledgement information, negative acknowledgement information or no acknowledgement information to the network device, so that the network device can effectively perform subsequent resource scheduling and other processes according to feedback of the terminal device, and stability and reliability of side communication between the terminal device and the terminal device are ensured.
Description
Technical Field
The present disclosure relates to the field of communications technologies, and in particular, to a communications method, apparatus, and device.
Background
Side Link (SL) communication is a communication method of "physical" direct connection, and unlike conventional terminal devices, communication data must pass through a network device, side link communication allows direct transmission of communication data between terminal devices.
In the prior art, the side uplink communication resources used by the terminal device for performing the side uplink communication can be configured by the network device, and when the terminal device does not use the side uplink communication resources allocated to the terminal device by the network device, how the terminal device should feed back to the network device, so that the network device can effectively perform subsequent processing such as resource scheduling according to the feedback of the terminal device, which is a technical problem to be solved in the art.
Disclosure of Invention
The application provides a communication method, a device and equipment, which enable terminal equipment to feed back to network equipment when discarding side uplink communication resources, and ensure that the network equipment can effectively carry out subsequent operation according to the feedback of the terminal equipment.
A first aspect of the present application provides a communication method, applied to a terminal device, including: the method comprises the steps that terminal equipment receives a first side link grant sent by network equipment, wherein the first side link grant is used for indicating first side link communication resources; when the terminal device discards the first side-link communication resource, the terminal device transmits acknowledgement information, negative acknowledgement information or no acknowledgement information to the network device.
In a first embodiment of the first aspect of the present application, the terminal device is configured to communicate with the network device via a discontinuous reception, DRX, mode, and/or the terminal device is configured to perform side-link communication via a DRX mode.
In a first embodiment of the first aspect of the present application, after the terminal device sends acknowledgement information to the network device, the method further includes: the terminal equipment receives a second side uplink grant sent by the network equipment; the second side uplink grant indicating a second side uplink communication resource, the second side uplink grant and the first side uplink grant being associated with a same hybrid automatic repeat request, HARQ, process; when the first side link communication resource is an initial transmission resource and the terminal equipment carries out packet processing on the side link communication data to be sent, or when the first side link communication resource is a retransmission resource, if the second new data of the second side link grant indicates that the NDI is overturned compared with the first NDI of the first side link grant, the terminal equipment considers that the NDI is not overturned.
In a first embodiment of the first aspect of the present application, the sending, by the terminal device, negative acknowledgement information to the network device includes: and when the first side link communication resource is a primary transmission resource and the terminal equipment carries out packet processing on the side link communication data to be transmitted, or when the first side link communication resource is a retransmission resource, the terminal equipment transmits a negative acknowledgement to the network equipment.
In a first embodiment of the first aspect of the present application, the terminal device does not send response information to the network device, including: and when the first side uplink communication resource is a primary transmission resource, the terminal equipment does not carry out packet processing on the side uplink communication data to be sent, and the terminal equipment does not send response information to the network equipment.
In a first embodiment of the first aspect of the present application, the discarding, by the terminal device, the first side uplink communication resource includes: when the terminal equipment needs to send uplink communication data and side uplink communication data at the same time, and the side uplink communication data is not prioritized, the terminal equipment discards the first side uplink communication resource; or when the terminal equipment determines that the first side uplink communication resource is occupied through a Listen Before Talk (LBT) mechanism, the terminal equipment discards the first side uplink communication resource; or when the terminal equipment determines that the receiving end for side-link communication is not in an active period, the terminal equipment discards the first side-link communication resource.
In a first embodiment of the first aspect of the present application, the terminal device has performed packet processing on side uplink communication data to be sent, including: when the terminal equipment needs to send uplink communication data and side uplink communication data at the same time, the side uplink communication data is not prioritized; or when the terminal equipment determines that the first side uplink communication resource is occupied through a Listen Before Talk (LBT) mechanism.
In an embodiment of the first aspect of the present application, the terminal device does not perform packet processing on side uplink communication data to be sent, including: and when the terminal equipment determines that the receiving end for side-link communication is not in the active period.
A second aspect of the present application provides a communication method, applied to a network device, including: the network device sends a first side-link grant to the terminal device, the first side-link grant indicating a first side-link communication resource; the terminal device is configured to communicate with the network device via discontinuous reception, DRX, mode; and/or the terminal device is configured to perform side-link communication in a DRX mode; the network equipment receives the positive acknowledgement information or the negative acknowledgement information sent by the terminal equipment; wherein the acknowledgement information and the negative acknowledgement information are sent by the terminal device after discarding the first side uplink communication resource.
In an embodiment of the second aspect of the present application, after the network device receives the positive acknowledgement information or the negative acknowledgement information sent by the terminal device, or after the network device sends the first side uplink grant to the terminal device, the method further includes: the network device sends a second side uplink grant to the terminal device, the second side uplink grant indicating a second side uplink communication resource, the second side uplink grant and the first side uplink grant being associated with a same hybrid automatic repeat request, HARQ, process.
In an embodiment of the second aspect of the present application, when the network device does not receive the acknowledgement information and the negative acknowledgement information sent by the terminal device after sending the first side uplink grant to the terminal device, the second side uplink communication resource is consistent with the size of the first side uplink communication resource.
A third aspect of the present application provides a communication device operable to perform a communication method as provided in the first aspect of the present application, comprising: the system comprises a transceiver module and a processing module, wherein the processing module is used for receiving a first side uplink grant sent by network equipment through the transceiver module, and the first side uplink grant is used for indicating first side uplink communication resources; the terminal device is configured to communicate with the network device via discontinuous reception, DRX, mode and/or the terminal device is configured to communicate side-links via DRX mode; the processing module is configured to determine to discard the first side uplink communication resource; the processing module is further configured to send acknowledgement information, negative acknowledgement information, or no acknowledgement information to the network device through the transceiver module when the terminal device discards the first side-link communication resource.
In an embodiment of the third aspect of the present application, the processing module is further configured to receive, through the transceiver module, a second side uplink grant sent by the network device; the second side uplink grant indicating a second side uplink communication resource, the second side uplink grant and the first side uplink grant being associated with a same hybrid automatic repeat request, HARQ, process; the processing module is further configured to, when the first side uplink communication resource is an initial transmission resource and the terminal device has performed packet processing on the side uplink communication data to be sent, or when the first side uplink communication resource is a retransmission resource, consider that NDI is not flipped when NDI is compared with first NDI of the first side uplink grant if second new data of the second side uplink grant indicates NDI is flipped.
In an embodiment of the third aspect of the present application, the processing module is further configured to, when the first side uplink communication resource is a primary transmission resource, and the terminal device has already performed packet processing on side uplink communication data to be sent, or when the first side uplink communication resource is a retransmission resource, send a negative acknowledgement to the network device through the transceiver module.
In an embodiment of the third aspect of the present application, the processing module is further configured to, when the first side uplink communication resource is a primary transmission resource, and the terminal device does not perform packet processing on the side uplink communication data to be sent, and does not send response information to the network device.
In an embodiment of the third aspect of the present application, the processing module is specifically configured to discard the first side uplink communication resource when the terminal device needs to send uplink communication data and side uplink communication data at the same time, and the side uplink communication data is not prioritized; or when the terminal equipment determines that the first side uplink communication resource is occupied through a Listen Before Talk (LBT) mechanism, discarding the first side uplink communication resource; or when the terminal equipment determines that the receiving end for side-link communication is not in an active period, discarding the first side-link communication resource.
In an embodiment of the third aspect of the present application, the processing module is specifically configured to, when uplink communication data and side uplink communication data need to be sent simultaneously, and the side uplink communication data is not prioritized; alternatively, the first side-link communication resource is determined to be occupied by a listen-before-talk, LBT, mechanism.
In an embodiment of the third aspect of the present application, the processing module is specifically configured to, when the terminal device determines that the receiving end performing the side uplink communication is not in an active period.
A fourth aspect of the present application provides a communication device operable to perform a communication method as provided in the second aspect of the present application, comprising: the system comprises a processing module and a receiving and transmitting module, wherein the processing module is used for transmitting a first side link grant to the terminal equipment through the receiving and transmitting module, and the first side link grant is used for indicating first side link communication resources; the terminal device is configured to communicate with the network device via discontinuous reception, DRX, mode; and/or the terminal device is configured to perform side-link communication in a DRX mode; the processing module is further used for receiving positive acknowledgement information or negative acknowledgement information sent by the terminal equipment through the receiving and transmitting module; wherein the acknowledgement information and the negative acknowledgement information are sent by the terminal device after discarding the first side uplink communication resource.
In an embodiment of the fourth aspect of the present application, the processing module is further configured to, after the network device receives the positive acknowledgement information or the negative acknowledgement information sent by the terminal device, or after the network device sends the first side downlink grant to the terminal device, not receive the positive acknowledgement information and the negative acknowledgement information sent by the terminal device, send, to the terminal device, a second side downlink grant through the transceiver module, where the second side downlink grant is used to indicate a second side uplink communication resource, and the second side downlink grant and the first side downlink grant are associated with the same hybrid automatic repeat request HARQ process.
In an embodiment of the fourth aspect of the present application, when the network device does not receive the acknowledgement information and the negative acknowledgement information sent by the terminal device after sending the first side uplink grant to the terminal device, the second side uplink communication resource is consistent with the size of the first side uplink communication resource.
A fifth aspect of the present application provides a communication device comprising a processor and a memory; the memory is used for storing programs; the processor is configured to invoke the program stored in the memory to perform the communication method according to any of the first aspects of the present application.
A sixth aspect of the present application provides a communication device comprising a processor and a memory; the memory is used for storing programs; the processor is configured to invoke the program stored in the memory to perform the communication method according to any of the second aspects of the present application.
A seventh aspect of the present application provides a computer readable storage medium storing a computer program which when executed is operable to perform a communication method as set out in any one of the first aspects of the present application.
An eighth aspect of the present application provides a computer readable storage medium storing a computer program which when executed is operable to perform a communication method as set out in any of the second aspects of the present application.
A ninth aspect of the present application provides a computer program product comprising a computer program which when executed is operable to implement a communication method as claimed in any one of the first aspects of the present application.
A tenth aspect of the present application provides a computer program product comprising a computer program which when executed is operable to implement a communication method as claimed in any of the second aspects of the present application.
In summary, the communication method, the device and the equipment provided by the application, after discarding the side uplink communication resource allocated by the network equipment, the terminal equipment sends the acknowledgement information, the negative acknowledgement information or does not send the acknowledgement information to the network equipment, so that the network equipment can effectively perform subsequent processing such as resource scheduling according to feedback of the terminal equipment, and stability and reliability of communication between the terminal equipment and the network equipment are ensured.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive faculty for a person skilled in the art.
Fig. 1 is a schematic architecture diagram of a communication system to which embodiments of the present application may be applied;
FIG. 2 is a flow chart of an embodiment of a communication method provided in the present application;
FIG. 3 is a flow chart of an embodiment of a communication method provided in the present application;
FIG. 4 is a flow chart of an embodiment of a communication method provided in the present application;
FIG. 5 is a flow chart of an embodiment of a communication method provided in the present application;
fig. 6 is a schematic structural diagram of a communication device provided in the present application;
fig. 7 is a schematic structural diagram of an embodiment of a communication device provided in the present application.
Detailed Description
The following description of the embodiments of the present application will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are only some, but not all, of the embodiments of the present application. All other embodiments, which can be made by one of ordinary skill in the art without undue burden from the present disclosure, are within the scope of the present disclosure.
The terms "first," "second," "third," "fourth" and the like in the description and in the claims of this application and in the above-described figures, if any, are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate such that embodiments of the present application described herein may be capable of operation in sequences other than those illustrated or described herein, for example. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.
The following describes and illustrates a scenario applied in the present application and problems existing in the scenario with reference to fig. 1. Fig. 1 is a schematic architecture diagram of a communication system to which the embodiments of the present application may be applied; as shown in fig. 1, the communication system includes a network device and at least one terminal device (e.g., terminal device 1 and terminal device 2 in fig. 1), which can be connected to the network device by wireless or wired means. Fig. 1 is only a schematic diagram, and other network devices may be further included in the communication system, for example, a wireless relay device and a wireless backhaul device may also be included, which are not shown in fig. 1. The number of network devices and terminal devices included in the mobile communication system is not particularly limited in the embodiments of the present application.
In some possible implementations, the communication system shown in fig. 1 may be applicable to a fifth Generation (5 th Generation: 5G) communication system, may also be applicable to a fourth Generation (4 th Generation: 4G) communication system, a third Generation (3 rd Generation: 3G) communication system, and may also be applicable to a new future communication system, for example, a sixth Generation (6 th Generation: 6G), a seventh Generation (7 th Generation: 7G), and the embodiment of the present application is not limited thereto. The technical solution of the present application is also applicable to different network architectures, including but not limited to a relay network architecture, a dual link architecture, a Vehicle-to-Everything (V2X) architecture, a Device-to-Device (D2D) architecture, and so on.
In some possible implementations, the network device may be an Access device that a terminal device accesses to a mobile communication system in a wireless manner, and may also be referred to as a base station or the like, for example, a device that provides a base station function in a 2G network includes a base Radio transceiver station (Base Transceiver Station, abbreviated as "BTS"), a device that provides a base station function in a 3G network includes a node B (NodeB), a device that provides a base station function in a 4G network includes an evolved NodeB (eNB), a device that provides a base station function in a wireless local area network (Wireless Local Area Networks, abbreviated as "WLAN") is an Access Point (AP), a device that provides a base station function in a 5G New Radio (New Radio, abbreviated as "NR"), and a node B that continues to evolve (ng-eNB), where the gNB and the terminal communicate using NR technology, and an evolved universal terrestrial Radio Access (Evolved Universal Terrestrial Radio Access, abbreviated as "E-UTRA") technology is used between the gNB and the terminal, and the gNB and the device may be connected to the 5G core network. The base station in the embodiment of the present application also includes a device or the like that provides a base station function in a new communication system in the future. The base station controller in the embodiment of the present application may also be referred to as a base station controller device, and is a device for managing base stations, for example, a base station controller (Base Station Controller, abbreviated as BSC) in a 2G network, a radio network controller (Radio Network Controller, abbreviated as RNC) in a 3G network, and a device for controlling and managing base stations in a new future communication system.
In some possible implementations, the terminal device may also be referred to as a terminal (terminal). A terminal device may refer to various forms of User Equipment (UE), access terminals, subscriber units, subscriber stations, mobile Stations (MS), remote stations, remote terminals, mobile devices, user terminals, wireless communication devices, user agents, or User Equipment. The terminal device may also be a cellular phone, a cordless phone, a session initiation protocol (Session Initiation Protocol, SIP) phone, a wireless local loop (Wireless Local Loop, WLL) station, a personal digital assistant (Personal Digital Assistant, PDA), a handheld device with wireless communication capability, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in a future 5G network or a terminal device in a future evolved public land mobile network (Public Land Mobile Network, PLMN), etc., as examples. The specific technology and specific device configuration adopted by the access network device in the embodiments of the present application are not limited.
The network devices and/or terminal devices may be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; the device can be deployed on the water surface; but also on aerial planes, balloons and satellites. The embodiment of the application does not limit the application scene of the network equipment and the terminal equipment. Communication between the network device and the terminal device and between the terminal device and the terminal device can be performed through a licensed spectrum (licensed spectrum), communication can be performed through an unlicensed spectrum (unlicensed spectrum), and communication can be performed through both the licensed spectrum and the unlicensed spectrum. The spectrum resources used between the network device and the terminal device and between the terminal device and the terminal device may be, for example, 4G spectrum, 5G spectrum. The embodiments of the present application do not limit the spectrum resources used between the network device and the terminal device.
In order to improve communication efficiency of the communication system and reduce network load, in some communication systems such as an LTE communication system, a 5G communication system, etc., as shown in fig. 1, a side link (SL, etc.) communication scheme between terminal devices may be provided. The side-link communication herein may also be referred to as a side-link communication, or the like. The side-link communication allows direct transmission (communication) of data between terminal devices that are authorized (e.g. authorized for public safety operation), e.g. in a system as shown in fig. 1, the link of communication between the network device and the terminal devices may be an Uplink (Uplink) or a Downlink (Downlink) provided over a Uu interface. The side-link communication between the terminal device 1 and the terminal device 2 can be realized through the PC5 interface. Illustratively, it is assumed that the terminal device 1 in fig. 1 may transmit data to the terminal device 2 as a transmitting end of the side-link communication, and the terminal device 2 may receive the data transmitted from the terminal device 1 as a receiving end of the side-link communication. In the above-mentioned side-link communication process, the network device does not directly participate in the terminal device 1 to send data to the terminal device 2, i.e. the data of the terminal device 1 does not pass through the network device, but directly arrives at the terminal device 2 from the terminal device 1, so that the end-to-end direct transmission of the data is realized. In addition to providing one-to-one communication, one-to-many side-link communication may be provided, and one-to-one and one-to-many side-link communication may be divided into communication including relay nodes and communication including no relay nodes. The example of fig. 1 of the present application is merely taken as an example of one-to-one communication in side-link communication, and the number of terminal devices and whether relay nodes are included in side-link communication are not limited.
Although the terminal device and the terminal device can transmit data through the side-link communication mode, no direct participation of the network device exists. However, communication resources used in transmitting data and receiving data in the side-link communication between terminal devices are still required to be configured in some situations. Therefore, the terminal equipment can use legal and proper communication resources to carry out side-link communication, so that the side-link communication efficiency of the terminal equipment is improved, and the interference of the resources used by the terminal equipment in the side-link communication to other terminal equipment or other communication modes is avoided.
In the above-mentioned process of determining communication resources, since the user equipment is typically powered by a battery, in order to extend the service life of the battery, frequent battery replacement or charging is avoided, and for the purpose of energy saving, a discontinuous reception (Discontinuous reception, abbreviated as: DRX) mechanism is defined in some communication systems as shown in fig. 1. The terminal device monitors control information from the network device only under a specific condition or within a specific period of time, for example, the terminal device can start a timer under a preset specific condition, and during the running period of the timer, detect downlink control information (Downlink control information, DCI) carried on a physical downlink control channel (Physical downlink control channel, PDCCH) sent by the network device. For example, there is an inactivity timer (inactivity timer) in DRX, and when the terminal device receives DCI for scheduling new transmission data, the inactivity timer is started, and during operation of the inactivity timer, monitoring of the PDCCH is performed. Since the terminal device does not need to detect the control information every moment, power consumption can be reduced. The period of time during which the terminal device needs to listen for control information is called an active time.
In the communication system shown in fig. 1, in addition to the DRX mechanism being configured between the network device and the terminal device, the DRX mechanism may also be configured between the terminal devices, so that when the DRX mechanism is configured on the communication link where the two terminal devices perform the side-link communication, the terminal device as the receiving end wakes up in the active period, and listens for the side-line control information (sidelink control information, abbreviated as SCI) sent by the terminal device from the sending end.
Further, when the terminal equipment performs side-link communication, the terminal equipment serving as a transmitting end can automatically select idle resources to transmit data by monitoring control information of other terminal equipment; or the network device may allocate transmission resources to the terminal device through the downlink control information, so that the terminal device serving as the transmitting end transmits data according to the scheduled communication resources of the network device. When the DRX mechanism is also configured for the side uplink communication performed by the terminal device, if the communication resource used by the terminal device is obtained by the second scheduling manner of the network device, the network device needs to ensure that the communication resource is allocated to the terminal device of the transmitting end to transmit the data communication resource, and is within the activation time of the terminal device of the receiving end.
Because the communication resources used for the side-link communication between the terminal devices are distributed by the network device, after the terminal device of the sending end sends data to the terminal device of the receiving end, if the data carried by the used communication resources are successfully decoded by the receiving end, the terminal device of the sending end sends a determination response (ACK) to the network device through a physical uplink control channel (Physical uplink control channel, PUCCH); if the data carried by the used communication resource is not successfully decoded by the receiving end, the terminal device of the transmitting end sends (Negative Acknowledgement, abbreviated as NACK) to the network device through the PUCCH.
When the network device allocates the communication resource used for the side uplink to the terminal device, however, the terminal device at the transmitting end may not transmit data using the communication resource, but discards (drop, skip, etc.) the communication resource allocated thereto by the network device. Such cases of discarding communication resources include: type1: UL/SL prioritization; type2: listen before send (listen before talk, LBT for short) failed; type3: the terminal device of the transmitting end determines that none of the terminal devices of the receiving end is in an active period.
Specifically, in Type1, UL/SL prioritization refers to that when a terminal device acting as a transmitting end concurrently transmits uplink communication data to a network device and side uplink communication data to a terminal device of a receiving end, the terminal device is limited in transmission capability of the terminal device so that the terminal device cannot simultaneously transmit the uplink data and the side uplink data, and when the priority of the side uplink data is lower, the side uplink communication data is not prioritized, and the terminal device of the transmitting end discards the side uplink communication resource allocated thereto by the network device. In Type2, LBT failure refers to when the terminal device works on an unlicensed band, and before transmitting the side uplink data, monitors a channel through an LBT mechanism and determines that a channel corresponding to the side uplink communication resource is occupied, the terminal device at the transmitting end also discards the side uplink communication resource allocated to the terminal device by the network device. In Type3, the terminal device at the transmitting end determines that none of the terminal devices at the receiving end (Destination) is in an active period (active time), and discards the side uplink communication resources allocated to the network device.
Therefore, the terminal device may discard the side uplink communication resources (sidelink grant) allocated to the terminal device by the network device due to Type1, type2, type3, and the like, and how the terminal device should feed back to the network device at this time, so that the network device can effectively perform subsequent processing such as resource scheduling according to the feedback of the terminal device, and ensure stability and reliability of communication between the terminal device and the network device, which is a technical problem that needs to be solved in the art.
The technical scheme of the present application is described in detail below with specific examples. The following embodiments may be combined with each other, and some embodiments may not be repeated for the same or similar concepts or processes.
Fig. 2 is a schematic flow chart of an embodiment of a communication method provided in the present application, where the communication method shown in fig. 2 may be applied to the scenario shown in fig. 1, and executed by the network device, the terminal device 1, and the terminal device 2, and takes the terminal device 1 as a transmitting end of the side uplink communication and the terminal device 2 as a receiving end of the side uplink communication as an example. And terminal device 1 is configured to communicate with terminal device 2 in a side-link manner by DRX (SL DRX) and/or terminal device 1 is configured to communicate with a network device in a DRX manner (Uu DRX). Specifically, the communication method as shown in fig. 2 includes:
s101, the network device sends a first side uplink grant to the terminal device 1, where the first side uplink grant is used to instruct the network device to allocate a first side uplink communication resource to the terminal device 1, so that after the terminal device 1 receives the first side uplink grant, the first side uplink communication resource allocated by the network device is determined.
In some embodiments, the side-link grant sent by the network device to the terminal device 1 may be a signaling such as DCI or radio resource control (Radio Resource Control, abbreviated RRC) configuration.
S102, the terminal device 1 discards the first side-link communication resource acquired in S101.
In some embodiments, the terminal device 1 dropping the first side-link communication resource comprises at least the following several possible scenarios: type1: when the terminal equipment needs to send uplink communication data and side uplink communication data simultaneously, the data packet of the uplink communication data is prioritized over the data packet of the side uplink communication data, so that the side uplink communication data is not prioritized, and the terminal equipment discards the first side uplink communication resource; type2: when the terminal equipment determines that the first side link communication resource is occupied through a listen-before-send (LBT) mechanism, namely, receives an LBT failure indication from the physical layer, the terminal equipment discards the first side link communication resource; type3: when the terminal device determines that the receiving end performing the side-link communication is not in the active period, the terminal device discards the first side-link communication resource.
S1031: after S102, the terminal device 1 transmits acknowledgement information ACK to the network device.
In some embodiments, the terminal device 1 may specifically send acknowledgement information ACK on the PUCCH it sends to the network device. Then, for the network device, after receiving the acknowledgement information ACK, it is understood from the acknowledgement information ACK that the terminal device 1 has successfully transmitted the side uplink communication data to the terminal device 2, and the network device will not start the timer for the subsequent DRX communication.
Therefore, in the communication method provided in this embodiment, after discarding the first side uplink communication resource allocated by the network device, the terminal device 1 sends the acknowledgement information ACK to the network device, so that it can be ensured that the network device will not start the timer by mistake in the case that the terminal device 1 discards the first side uplink communication resource, thereby avoiding the problem of inconsistent understanding in the subsequent resource allocation, and further ensuring the stability and reliability of communication between the terminal device and the network device.
Fig. 3 is a flow chart of an embodiment of a communication method provided in the present application, where, on the basis of the embodiment shown in fig. 2, the communication method shown in fig. 3 further includes, after the terminal device 1 sends acknowledgement information ACK to the network device in S1031:
s104: the network device sends a second side-side uplink grant to the terminal device 1, wherein the second side-side uplink grant and the first side-side uplink grant are associated with the same hybrid automatic repeat request (HybridAutomatic Repeat reQuest, abbreviated as HARQ) process; the second side uplink grant is used to instruct the network device to allocate second side uplink communication resources to the terminal device 1, so that after the terminal device 1 receives the second side uplink grant, the second side uplink communication resources allocated by the network device are determined.
And S105, after receiving the second side uplink grant, the terminal equipment 1 considers that the NDI is not overturned, determines that the scheduling is retransmission, and then the terminal equipment 1 retransmits the side uplink communication data to the terminal equipment 2 by using the second side uplink communication resource through S106. The terminal device 1 specifically transmits the data packet of the side-link communication in the buffer to the terminal device 2 in S106 without performing the packetizing process on the new data.
In a specific implementation of S105-S106 shown in fig. 3, when the terminal device does not transmit the side uplink communication data in S102 due to Type1 or Type2, the side uplink communication data to be transmitted is already packetized in S1010 before S102, and the processed data packet is stored in the buffer. The terminal device receives the second side uplink grant at S104, and if the packet processing is performed again according to the scheduling of the network device, the terminal device may cause the packet coverage of the packet processing performed at S1010 to lose the packet. Therefore, for the terminal number device 1, if the second side uplink communication resource scheduled by the received second side uplink grant is the primary transmission resource, and the first side uplink communication resource acquired by the terminal device at the previous time is also the primary transmission resource and is discarded due to Type1 or Type2, that is, there is a packet that has undergone the packet processing in the buffer, at this time, even if the second NDI (New data indication) of the second side uplink grant sent by the network device according to the acknowledgement information ACK is inverted with the first NDI of the first side uplink grant, the terminal device 1 considers that the (constder) second NDI is not inverted compared with the first NDI, so that the terminal device 1 understands the scheduling as retransmission, and may send the packet in the buffer to the terminal device 2 in S106.
In another specific implementation manner of S105-S106, when the first side uplink communication resource is a retransmission resource, and the terminal device discards the side uplink communication resource and sends an acknowledgement information ACK to the network device, the network device turns over the second NDI in the second side uplink grant sent by the network device according to the received acknowledgement information ACK compared with the first NDI, but for the terminal device 1, it is still considered that the second NDI is not turned over compared with the first NDI, so that the terminal device 1 understands the present scheduling as a retransmission, and may send the data packet in the buffer to the terminal device 2 in S106.
Therefore, in the communication method provided in this embodiment, when the terminal device has a packet in its buffer, and sends the acknowledgement information ACK to the network device after discarding the first side uplink communication resource, after receiving the second side uplink grant that is inverted by NDI and sent by the network device according to the acknowledgement information ACK, the NDI is considered not to be inverted, so that the packet stored in the buffer can be retransmitted, thereby avoiding the packet coverage that has already been performed for packet from being lost, and improving the accuracy and stability of communication.
Fig. 4 is a flow chart of an embodiment of a communication method provided in the present application, in the embodiment shown in fig. 4, S101-S102 are the same as those shown in fig. 2, and are not repeated, after the terminal device 1 discards the first side uplink communication resource in S102, in S1032, the terminal device sends negative acknowledgement information NACK to the network device. At this time, for the network device, after receiving the negative acknowledgement information NACK, it can determine that the terminal device 1 further needs a new side uplink communication resource according to the NACK, and then, the second side uplink communication resource can be provided for the terminal device 1 in a manner of sending the second side uplink grant to the terminal device 1, so that the network device can effectively perform subsequent processing such as resource scheduling according to feedback of the terminal device, and stability and reliability of communication between the terminal device and the network device are ensured.
Fig. 5 is a schematic flow chart of an embodiment of a communication method provided in the present application, in the embodiment shown in fig. 5, S101-S102 are the same as those shown in fig. 2, and are not repeated, after the terminal device 1 discards the first side uplink communication resource in S102, the terminal device will not send acknowledgement information to the network device, that is, does not perform HARQ feedback, and will not send acknowledgement information ACK and negative acknowledgement information NACK to the network device. At this time, for the network device, since the feedback of the terminal device 1 is not received, the network device will consider that the first side uplink grant is not received, and will not start the timer, and the second side uplink communication resource may be provided for the terminal device 1 by continuing to send the second side uplink grant, and the size of the second side uplink communication resource should be consistent with that of the first side uplink communication resource. Wherein, the same size refers to the same capability of transmitting the data packet by the communication resource allocated twice.
Further, when implementing the embodiment shown in fig. 5, the terminal device 1 does not send the response information to the network device, if the first side uplink communication resource is the primary transmission resource and the terminal device does not perform the packet processing on the side uplink communication data to be sent. In the case where the terminal device 1 is on the first side-link communication resource for retransmission, or the first side-link communication resource is the primary transmission resource but the terminal device has already performed the packet processing on the side-link communication resource to be transmitted (i.e. the first side-link resource is discarded due to Type1 or Type 2), the terminal device 1 may still send the negative acknowledgement information NACK to the network device in the manner as described in fig. 4, so that the network device allocates the retransmission resource to the terminal device. Therefore, in the embodiment of the present application, when there is an unsent data packet in the buffer of the terminal device, negative acknowledgement information NACK is sent to the network device, so as to ensure that the size of the reallocated side uplink communication resources is consistent; when the terminal device performs packet processing on the first side uplink communication resource (i.e., the first side uplink communication resource is discarded due to Type 3) while the first side uplink communication resource is the primary transmission resource, the terminal device may not send response information to the network device, so that the size of the side uplink communication resource allocated again by the network device may be inconsistent, and flexibility in communication is improved.
In the foregoing embodiments, the communication method provided in the embodiments of the present application is described, and in order to implement the functions in the communication method provided in the embodiments of the present application, the network device and the terminal device as execution subjects may include hardware structures and/or software modules, and implement the functions in the form of hardware structures, software modules, or a hardware structure plus a software module. Some of the functions described above are performed in a hardware configuration, a software module, or a combination of hardware and software modules, depending on the specific application of the solution and design constraints.
For example, fig. 6 is a schematic structural diagram of a communication device provided in the present application, where the communication device 1000 shown in fig. 6 includes: a transceiver module 1001 and a processing module 1002. Wherein, when the communication apparatus 1000 performs the communication method in the foregoing embodiments of the present application as a terminal device, the processing module 1002 may be configured to receive, through the transceiver module 1001, a first side uplink grant sent by a network device; determining to discard the first side uplink communication resource; and when the terminal device discards the first side uplink communication resource, transmitting acknowledgement information, negative acknowledgement information, no acknowledgement information, or the like to the network device through the transceiving module 1001. When the communication apparatus 1000 performs the communication method in the foregoing embodiments of the present application as a network device, the processing module 1002 may be configured to send a first side uplink grant to the terminal device through the transceiver module 1001; and receiving acknowledgement information or negative acknowledgement information and the like sent by the terminal equipment through the transceiver module.
Specifically, the specific principles and implementation manners of the foregoing steps performed by each module in the communication apparatus 1000 respectively may refer to descriptions in the communication methods in the foregoing embodiments of the present application, and are not repeated.
It should be noted that, it should be understood that the division of the modules of the above apparatus is merely a division of a logic function, and may be fully or partially integrated into a physical entity or may be physically separated. And these modules may all be implemented in software in the form of calls by the processing element; or can be realized in hardware; the method can also be realized in a form of calling software by a processing element, and the method can be realized in a form of hardware by a part of modules. The function of the above determination module may be implemented as a processing element that is set up separately, or may be integrated into a chip of the above apparatus, or may be stored in a memory of the above apparatus in the form of program codes, and may be called and executed by a processing element of the above apparatus. The implementation of the other modules is similar. In addition, all or part of the modules can be integrated together or can be independently implemented. The processing element described herein may be an integrated circuit having signal processing capabilities. In implementation, each step of the above method or each module above may be implemented by an integrated logic circuit of hardware in a processor element or an instruction in a software form.
For example, the modules above may be one or more integrated circuits configured to implement the methods above, such as: one or more specific integrated circuits (application specific integrated circuit, ASIC), or one or more microprocessors (digital signal processor, DSP), or one or more field programmable gate arrays (field programmable gate array, FPGA), or the like. For another example, when a module above is implemented in the form of a processing element scheduler code, the processing element may be a general purpose processor, such as a central processing unit (central processing unit, CPU) or other processor that may invoke the program code. For another example, the modules may be integrated together and implemented in the form of a system-on-a-chip (SOC).
In the above embodiments, it may be implemented in whole or in part by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, produces a flow or function in accordance with embodiments of the present application, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable apparatus. The computer instructions may be stored in or transmitted from one computer-readable storage medium to another, for example, by wired (e.g., coaxial cable, optical fiber, digital Subscriber Line (DSL)), or wireless (e.g., infrared, wireless, microwave, etc.). The computer readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that contains an integration of one or more available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., solid State Disk (SSD)), etc.
Fig. 7 is a schematic structural diagram of an embodiment of a communication device provided in the present application, where the communication device 2000 shown in fig. 7 includes: processor 2010 and memory 2020; in which a computer program is stored in a memory 2020, which processor 2010 is operable to perform a communication method performed by a terminal device or a network device as in any of the previous embodiments of the present application when the processor 2010 executes the computer program. The communication device 2000 shown in fig. 7 further includes a communication interface 2030, and the processor 2010 can transmit and receive data through the communication interface 2030, and each unit in the communication device 2000 can be connected through a bus 2040.
The present application also provides a computer readable storage medium storing a computer program which when executed is operable to perform a communication method as performed by a terminal device or a network device in any of the previous embodiments of the present application.
The embodiment of the application also provides a chip for running the instruction, and the chip is used for executing the communication method executed by the terminal equipment or the network equipment in any of the previous embodiments of the application.
Embodiments of the present application also provide a computer program product comprising a computer program which when executed is operable to implement a communication method as performed by a terminal device or a network device in any of the previous embodiments of the present application.
Those of ordinary skill in the art will appreciate that: all or part of the steps for implementing the method embodiments described above may be performed by hardware associated with program instructions. The foregoing program may be stored in a computer readable storage medium. The program, when executed, performs steps including the method embodiments described above; and the aforementioned storage medium includes: various media that can store program code, such as ROM, RAM, magnetic or optical disks.
Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present application.
Claims (15)
1. A method of communication, comprising:
the method comprises the steps that terminal equipment receives a first side link grant sent by network equipment, wherein the first side link grant is used for indicating first side link communication resources;
When the terminal device discards the first side-link communication resource, the terminal device transmits acknowledgement information, negative acknowledgement information or no acknowledgement information to the network device.
2. The method of claim 1, further comprising, after the terminal device transmits acknowledgement information to the network device:
the terminal equipment receives a second side uplink grant sent by the network equipment; the second side uplink grant indicating a second side uplink communication resource, the second side uplink grant and the first side uplink grant being associated with a same hybrid automatic repeat request, HARQ, process;
when the first side link communication resource is an initial transmission resource and the terminal equipment carries out packet processing on the side link communication data to be sent, or when the first side link communication resource is a retransmission resource, if the second new data of the second side link grant indicates that the NDI is overturned compared with the first NDI of the first side link grant, the terminal equipment considers that the NDI is not overturned.
3. The method according to claim 1, wherein the terminal device sends negative acknowledgement information to the network device, comprising:
And when the first side link communication resource is a primary transmission resource and the terminal equipment carries out packet processing on the side link communication data to be transmitted, or when the first side link communication resource is a retransmission resource, the terminal equipment transmits a negative acknowledgement to the network equipment.
4. The method of claim 1, wherein the terminal device does not send acknowledgement information to the network device, comprising:
and when the first side uplink communication resource is a primary transmission resource, the terminal equipment does not carry out packet processing on the side uplink communication data to be sent, and the terminal equipment does not send response information to the network equipment.
5. The method according to any of claims 1 to 4, wherein the terminal device discarding the first side-link communication resource comprises:
when the terminal equipment needs to send uplink communication data and side uplink communication data at the same time, and the side uplink communication data is not prioritized, the terminal equipment discards the first side uplink communication resource;
or when the terminal equipment determines that the first side uplink communication resource is occupied through a Listen Before Talk (LBT) mechanism, the terminal equipment discards the first side uplink communication resource;
Or when the terminal equipment determines that the receiving end for side-link communication is not in an active period, the terminal equipment discards the first side-link communication resource.
6. A method according to claim 2 or 3, characterized in that the terminal device has packet-processed the side-link communication data to be transmitted, comprising:
when the terminal equipment needs to send uplink communication data and side uplink communication data at the same time, the side uplink communication data is not prioritized;
or when the terminal equipment determines that the first side uplink communication resource is occupied through a Listen Before Talk (LBT) mechanism.
7. The method of claim 4, wherein the terminal device does not perform packet processing on the side uplink communication data to be transmitted, comprising:
and when the terminal equipment determines that the receiving end for side-link communication is not in the active period.
8. The method according to any one of claim 1 to 4, wherein,
the terminal device is configured to communicate with the network device via discontinuous reception, DRX, mode and/or the terminal device is configured to communicate side-links via DRX mode.
9. A method of communication, comprising:
the network device sends a first side-link grant to the terminal device, the first side-link grant indicating a first side-link communication resource;
the network equipment receives the positive acknowledgement information or the negative acknowledgement information sent by the terminal equipment; wherein the acknowledgement information and the negative acknowledgement information are sent by the terminal device after discarding the first side uplink communication resource.
10. The method of claim 9, wherein the acknowledgement information and the negative acknowledgement information sent by the terminal device are not received after the network device receives the acknowledgement information or the negative acknowledgement information sent by the terminal device, or after the network device sends a first side uplink grant to the terminal device, the method further comprising:
the network device sends a second side uplink grant to the terminal device, the second side uplink grant indicating a second side uplink communication resource, the second side uplink grant and the first side uplink grant being associated with a same hybrid automatic repeat request, HARQ, process.
11. The method of claim 10, wherein the step of determining the position of the first electrode is performed,
and when the network equipment does not receive the positive acknowledgement information and the negative acknowledgement information sent by the terminal equipment after sending the first side uplink authorization to the terminal equipment, the second side uplink communication resource is consistent with the first side uplink communication resource in size.
12. A communication device for performing the communication method according to any of claims 1-11.
13. A communication device, comprising: a processor and a memory; the memory is used for storing programs; the processor is configured to invoke a program stored in the memory to perform the communication method according to any of claims 1-11.
14. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program which, when executed, is operable to perform the communication method of any of claims 1-11.
15. A computer program product comprising a computer program which, when executed, is operable to carry out the communication method of any one of claims 1-11.
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